127959691634 has 16 divisors (see below), whose sum is σ = 193494533400. Its totient is φ = 63463592064.

The previous prime is 127959691633. The next prime is 127959691661. The reversal of 127959691634 is 436196959721.

127959691634 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 127915668409 + 44023225 = 357653^2 + 6635^2 .

It is not an unprimeable number, because it can be changed into a prime (127959691633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 396107 + ... + 642510.

Almost surely, 2^127959691634 is an apocalyptic number.

127959691634 is a deficient number, since it is larger than the sum of its proper divisors (65534841766).

127959691634 is a wasteful number, since it uses less digits than its factorization.

127959691634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039117.

The product of its digits is 22044960, while the sum is 62.

The spelling of 127959691634 in words is "one hundred twenty-seven billion, nine hundred fifty-nine million, six hundred ninety-one thousand, six hundred thirty-four".